norway



A. A. ALFSEN.

BARKING DRUM.

APPLICATION FILED MAY 16. um.

Patented Nov. 4, 1919.

Iii en 2:07-

1311mm ey.

ADOLF AUGUST ALFSEN, 0F AADALEN, NEAR HEEN, NORWAY, ASSIGNOR TO A /S.MYRENS VERKSTED, OF CHRISTIANIA, NORWAY.

BARKING-DRUM.

Specification of Letters Patent.

Patented Nov. 4, 1919.

Application filed May 16, 1917. Serial No. 169,095.

To all whom it may concern:

Be it lmown that I, ADOLF AUGUST A121 SEN, a subject of the King ofNorway, residing at Aadalen, near Heen, in the Kingdom of Norway, haveinvented certain new and useful Improvements in Barking- Drums; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to makeand use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

Up to the present time barking-drums have generally been manufacturedwith both ends open, the wood passing continuously in through one end ofthe drum and out through the opposite end. Barking-drums with closedends have also been used, which drums have been worked in an interruptedprocess, the lumber or wood being fed in and out through a suitablecharging opening on one side of the drum.

None of these arrangements are suitable for barking Wood or lumber ofconsiderable length. In the barking process as applied on such lumberdrums 'of approximately the same length as the lumber are utilized, andit is therefore not possible to let the lumber pass continuously throughthe drums.

On the other hand the charging and discharging of the drums throughcharging openings at the side of the drums takes too much time.

According to the present invention the barking of lumber takes lace inlong drums, open at both ends and mounted in chains or rollers, thelongitudinal movement of the ltunber being prevented through therotation of the barking-drum by means of pivoted walls or end covers,located at both ends of the drum and independent of the same.

By arranging the said. walls or covers pivotally on horizontal hinges,they may easily and quickly be removed from the end opening of the drum,whereby the lumber may be put in and out of the same.

On the drawing are shown two forms of the invention.

Figure 1 is a longitudinal section of a barking-drum and Fig. 2 is anend view of the same.

Fig. 8 is a slightly modified form of the invention.

Referring to Figs. 1 and 2, 1 is the bark ing-drum and 2 is the troughin which the drum rotates. At each end of the drum the trough isprovided with a wall 3. Said walls are not required to extend right upto the upper side of the drum, as the drum will never be completelyfilled with lumber. The walls are pivotally connected by means of hinges4E with the bottom or end pieces of the trough and are maintained inupright position by means of columns 5, to which they are fastened bymeans of bolts 6.

The form of the invention illustrated on Fig. 3 differs from the abovespecified form thereby that the drum is combined with means for chargingthe same with lumber. Said means consists in an endless chain 7, thelower part of which runs through the drum slightly below the upper sideof the same, guiding disks 8 preventing the chain from engaging thedrum, while the chain is tightened by means of tightening roller 9. Thelumber is fed into the drum by means of a chain 10 inclosing the lumberand being fastened to the chain 7 as illustrated on the drawing.

In order to perform the feeding of the lumber into the drum withoutdifficulty, the lumber is placed on a floor 11 a little higher than thelevel of the water in the trough. From this floor 11 a slope 12 leads tothe foot of the trough, and against this slope the walls 3 are restedduring the feeding of the lumber in and out of the drum.

I claim:

1. In a machine for barking lumber, a rotating open-ended barking drum,a water tank in which the lower part of said drum rotates, movable endpartitions cooperating with each end of saiddrum and adapted to preventlogs working out of the same, a charging floor arranged adjacent one endof said drum and above the lower inner wall thereof to facilitate thefeeding of relatively long logs into said drum, an elevated deliveryfloor adjacent the other end of said drum, inclined runways between saidfloors and the ends of said drum and an endless feed chain having onerun extending through the upper part of said drum.

2. In a machine for barking lumber, a rotating open-ended barking drum,a water tank in which the lower part of said drum rotates, adjustablemeans cooperating with each end of said drum and adapted to prevent logsworking out of the same, and a flexible feed device extending throughthe upper part of said drum.

3. In a machine for barking lumber in a continuous process a rotatingbarking-drum open at both ends, walls independent of the saidbarking-drum covering both ends of the same up to a certain height, oneor more of said walls being provided with means, such as hinges, forremoving the same from the position in which it covers the end openingof the drum, and means comprising an endless chain the lower part ofsaid chain running through the upper part of the drum for feeding lumberinto and out of said drum.

41-. In a machine for barking lumber in a continuous process a rotatingbarking-drum open at both ends, walls independent of the saidbarking-drum covering both ends of the same up to a certain height, oneor more of said walls being provided with means, such as hinges, forremoving the same from the position in which it covers the end openingof the drum and means comprising a floor on a somewhat higher level thanthe bottom of the drum and a slope leading from said floor toward thedrum for facilitating the charging of the drum.

5. In a machine for barking lumber, a rotating open-ended barking drum,a water tank in which the lower part of said drum rotates, movable endpartitions cooperating with each end of said drum and substantiallyclosing the lower part thereof to prevent logs working out of the sameand a charging floor arranged adjacent one end of said drum and abovethe lower inner wall thereof to facilitate the feeding of, relativelylong logs into said drum.

In testimony that I claim the foregoing as my invention, I have signedmy name in the presence of two subscribing witnesses.

AD OLF AUGUST ALFSEN.

"Witnesses KARL L. LEE, C. NORMAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

